I just tested this in Sitefinity 8.0 and also in the latest Sitefinity version (8.2) and I can verify that when you upload an image in a non-default language, the binary data of this image is not displayed when you try to translate the image in the default language.
However, when you enter the meta data for the default translation (e.g. Title) and publish it, the binary data of the image is properly displayed. Please also find attached a video demonstrating the steps I took to reproduce it and then the behavior after I published the translation in the default language.
I also logged an issue related to this in our feedback portal on the following link:
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I also updated your Telerik points accordingly.
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